The Hall of Monuments is accessed using a portal stone that simply teleports you there and back. The HoM/EotN does physically appear on the map, somewhat east/northeast of Frostgorge Sound as I recall (going off of memory), but its not within an explorable zone at this time.

If Anet adds expansion content dealing with Jormag, it seems probable that additional zones in the Far Shiverpeaks would logically have to be included. But of course Anet has not made any indication of their plans for any future content, so this is speculation.